filter type

low cutoff frequency

The low cutoff frequency, in Hz.

This value must be greater than zero but less than half the sampling frequency. If this input is less than zero or greater than half the sampling frequency, this node returns an error as well as an empty array for reverse coefficients and forward coefficients.

Default: 0.125

high cutoff frequency

The high cutoff frequency, in Hz. This value must observe the Nyquist criterion.

The node places the following restrictions on this parameter according to filter type:

filter type

Restrictions

Lowpass or Highpass

The node ignores this input.

Bandpass or Bandstop

This value must be greater than low cutoff frequency and less than half of sampling frequency.

Default: 0.45

order

The order of the IIR filter.

This input must be greater than zero. If it is not, the node returns an error as well as an empty array for Reverse Coefficients and Forward Coefficients in the output.

error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error

error in contains an error

If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

sampling frequency

The sampling frequency, in Hz.

sampling frequency must be greater than zero. If this input is less than or equal to zero, this node returns an error as well as an empty array for reverse coefficients and forward coefficients.

Default: 1

filter

Output IIR cascade filter.

filter structure

Structure of the output filter.

forward coefficients

The forward coefficients of the IIR cascade filter.

reverse coefficients

The reverse coefficients of the IIR cascade filter.

sampling frequency

The sampling frequency in Hz.

error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error

error in contains an error

If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application

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